Method for producing wiper blades and wiper blade for wiping panes

Abstract

The invention relates to a method for producing a wiper blades and to a wiper blade for wiping panes, in particular motor vehicle panes, comprising a support element ( 12 ) for receiving a wiper strip ( 14 ), to which a connecting device ( 20 ) is attached, which has a wiper blade-side part ( 15 ) having claw-like shoulders ( 50 ) surrounding the support element ( 12 ) at least in some regions. According to the invention, the wiper blade-side part ( 15 ) is pushed onto the support element with an only slightly larger inner width ( 44 ) than the thickness of the support element ( 12 ) and positioned, and is heat-treated after positioning.

1 . A method for producing a wiper blade having a supporting element ( 12 ) and a connection device ( 20 ), which is secured on the supporting element ( 12 ) by means of a part ( 15 ) on a wiper blade side, which has claw-type shoulders ( 50 ) which engage around the supporting element ( 12 ), at least in some region or regions, characterized in that the part ( 15 ) on the wiper blade side is pushed onto and positioned on the supporting element ( 12 ) with only a slightly larger clear width ( 42 ) than a thickness of the supporting element ( 12 ) and is heat treated after positioning. 
     
     
         2 . The method as claimed in  claim 1 , characterized in that the heat treatment acts on the claw-type shoulders ( 50 ) from a lower side. 
     
     
         3 . The method as claimed in  claim 1 , characterized in that the heat treatment acts on the supporting element ( 12 ) from a lower side. 
     
     
         4 . The method as claimed in  claim 1 , characterized in that the heat treatment takes place in the form of blown hot air ( 48 ). 
     
     
         5 . The method as claimed in  claim 1 , characterized in that the heat treatment takes place in the form of heat radiation ( 56 ). 
     
     
         6 . The method as claimed in  claim 1 , characterized in that the heat treatment takes place in inductive form ( 60 ,  62 ). 
     
     
         7 . The method as claimed in  claim 1 , characterized in that the heat treatment takes place by means of a hot plate ( 64 ). 
     
     
         8 . The method as claimed in  claim 1 , characterized in that the heat treatment takes place by means of a heating bath ( 68 ). 
     
     
         9 . The method as claimed in  claim 1 , characterized in that the supporting element ( 12 ) is transferred to a heating furnace ( 66 ) for the heat treatment. 
     
     
         10 . The method as claimed in  claim 1 , characterized in that the shoulders ( 50 ) are pressed during or after the heat treatment. 
     
     
         11 . The method as claimed in  claim 1 , characterized in that, after the heat treatment, the shoulders ( 50 ) are pressed and cooled by a cooling device. 
     
     
         12 . The method as claimed in  claim 1 , characterized in that a substance ( 70 ) which hardens and/or swells and/or bonds adhesively during the heat treatment is introduced into the clear width ( 42 ). 
     
     
         13 . The method as claimed in  claim 1 , characterized in that the supporting element ( 12 ) has two spaced spring rails ( 28 ,  30 ), which are placed against one another before the part ( 15 ) on the wiper blade side is pushed on and are adjusted to a correct spacing ( 32 ) after the positioning of the part ( 15 ) on the wiper blade side. 
     
     
         14 . A wiper blade for wiping windows, having a supporting element ( 12 ) for receiving a wiper strip ( 14 ), on which is secured a connection device ( 20 ), which has a part ( 15 ) on a wiper blade side with claw-type shoulders ( 50 ) which engage around the supporting element ( 12 ), at least in some region or regions, characterized in that the shoulders ( 50 ) have a clear width ( 42 ) which corresponds substantially to or is slightly greater than a thickness of the supporting element ( 12 ), and in that securing of the part ( 15 ) on the wiper blade side on the supporting element ( 12 ) is improved by a heat treatment acting at least on the shoulders ( 50 ). 
     
     
         15 . The wiper blade as claimed in  claim 14 , characterized in that the clear width ( 42 ) is within a tolerance range of from 0 mm to 0.5 mm, greater than the thickness of the supporting element ( 12 ). 
     
     
         16 . The wiper blade as claimed in  claim 14 , characterized in that the supporting element ( 12 ) has two spaced spring rails ( 28 ,  30 ), ends of which are each covered by an end cap ( 38 ), wherein at least one end cap ( 38 ) has a spacer ( 39 ). 
     
     
         17 . The wiper blade as claimed in  claim 14 , characterized in that the connection device ( 20 ) has run-on bevels ( 51 ) in the region of the shoulders ( 50 ). 
     
     
         18 . A wiper blade for wiping windows, having a supporting element ( 12 ) for receiving a wiper strip ( 14 ), on which is secured a connection device ( 20 ), which has a part ( 15 ) on a wiper blade side with claw-type shoulders ( 50 ) which engage around the supporting element ( 12 ), at least in some region or regions, produced the method of  claim 1 , characterized in that the shoulders ( 50 ) have a clear width ( 42 ) which corresponds substantially to or is slightly greater than the thickness of the supporting element ( 12 ), and in that the securing of the part ( 15 ) on the wiper blade side on the supporting element ( 12 ) is improved by a heat treatment acting at least on the shoulders ( 50 ). 
     
     
         19 . The wiper blade as claimed in  claim 14 , characterized in that the clear width ( 42 ) is within a tolerance range of from 0 mm to 0.2 mm greater than the thickness of the supporting element ( 12 ). 
     
     
         20 . The wiper blade as claimed in  claim 14 , characterized in that the clear width ( 42 ) is within a tolerance range of at least from 0 mm to 0.05 mm greater than the thickness of the supporting element ( 12 ).